A/C - System Operation Delayed For 1st Few Seconds

L-SB-0047-12

June 19, 2012

HVAC System Reinitializing

Service Category
Vehicle Interior

Section
Heating/Air Conditioning

Market
USA





Applicability

Introduction

Some vehicles may experience a condition where the HVAC system operation is delayed for the first few seconds after start up and the HVAC system resets to 75° F (24° C). This condition may be caused by a damaged air inlet door servo linkage. A new part kit and service procedure has been developed to address this condition.

NOTICE
The air inlet door servo linkage may be damaged if the cabin air filter is improperly replaced.





Warranty Information





Parts Information

Repair Procedure





1. Verify the air inlet door servo linkage is damaged as shown.

2. Remove the Air Conditioning Unit.








Refer to the Technical Information System (TIS), applicable model and model year Repair Manual:





3. Remove the blower assembly (LS 460/600h only).

A. Remove the screw.

B. Disconnect the connector.

C. Detach the claw and remove the blower unit.





4. Remove the upper portion of the blower motor housing by removing the retaining screws.





5. Remove the foam around the HVAC Air Inlet.





6. Release the clips securing the upper portion of the blower motor housing to the bottom portion.





7. Separate the upper portion the blower motor housing by removing the retaining screws and clip.





8. Install the new Air Inlet Door





9. Install the new foam around the HVAC Air Inlet





10. Reattach the upper blower motor housing to the lower blower motor housing.

11. Reattach the blower motor housing to the HVAC box

12. Install the Air Conditioning Unit





Refer to TIS, applicable model and model year Repair Manual:

13. Verify normal HVAC System Operation.

© 2012 Lexus, a division of Toyota Motor Sales, USA